NF EN ISO 17994
Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods
ISO 17994:2014 specifies an evaluation procedure for comparing two methods with established performance characteristics according to ISO/TR 13843 and intended for the quantification of the same target group or species of microorganisms. It provides the mathematical basis for the evaluation of the average relative performance of two quantitative methods against chosen criteria for the comparison. It does not provide data for assessment of the precision of the methods being compared. It is appropriate that the precision of methods is assessed as part of their performance characterization. ISO 17994:2014 does not provide methods for the verification of method performance characterization in a single laboratory.
ISO 17994:2014 specifies an evaluation procedure for comparing two methods with established performance characteristics according to ISO/TR 13843 and intended for the quantification of the same target group or species of microorganisms.
It provides the mathematical basis for the evaluation of the average relative performance of two quantitative methods against chosen criteria for the comparison. It does not provide data for assessment of the precision of the methods being compared. It is appropriate that the precision of methods is assessed as part of their performance characterization.
ISO 17994:2014 does not provide methods for the verification of method performance characterization in a single laboratory.
Le présent document définit une procédure d'évaluation qui permet de comparer deux méthodes visant à détecter ou à quantifier le même groupe cible ou la même espèce de micro-organismes. Deux méthodes quelconques de dénombrement fondées sur des comptages (de colonies ou de tubes positifs) ou deux méthodes quelconques de détection (méthodes présence/absence (P/A)) visant au même objectif peuvent être comparées.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes, définitions et symboles1
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4 Principe3
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5 Exigences fondamentales relatives à l'essai comparatif4
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6 Calculs8
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7 Évaluation9
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8 Rapport d'essai13
- Annexe A (informative) Logigramme14
- Annexe B (informative) Essais comparatifs15
- Annexe C (informative) Dérivation de l'équation pour le calcul du nombre d'échantillons17
- Annexe D (informative) Exemple d'une évaluation bilatérale19
- Bibliographie22
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